Since I checked out the license yesterday with the PTC Borrow command , I can´t test it until tomorow.
I found the windows firewall log ( Not easy to find ) . Ptc_d.exe is blocked , incomming TCP random ports . All I found was in between 49000-59999.
I tested license with or without "C:\Program Files\FLEXnet Admin License Server\licensing\ptc.opt" port=7789" but in firewall log there is no 7789 blocking so perhaps this licens file option is something not used anymore.